Observation of the Helium 7 Lambda hypernucleus by the (e,e'K+) reaction
Nuclear Experiment
2015-06-05 v4
Abstract
An experiment with a newly developed high-resolution kaon spectrometer (HKS) and a scattered electron spectrometer with a novel configuration was performed in Hall C at Jefferson Lab (JLab). The ground state of a neutron-rich hypernucleus, He 7 Lambda, was observed for the first time with the (e,e'K+) reaction with an energy resolution of ~0.6 MeV. This resolution is the best reported to date for hypernuclear reaction spectroscopy. The he 7 Lambda binding energy supplies the last missing information of the A=7, T=1 hypernuclear iso-triplet, providing a new input for the charge symmetry breaking (CSB) effect of \Lambda N potential.
Cite
@article{arxiv.1207.0571,
title = {Observation of the Helium 7 Lambda hypernucleus by the (e,e'K+) reaction},
author = {S. N. Nakamura and A. Matsumura and Y. Okayasu and T. Seva and V. M. Rodriguez and P. Baturin and L. Yuan and A. Acha and A. Ahmidouch and D. Androic and A. Asaturyan and R. Asaturyan and O. K. Baker and F. Benmokhtar and P. Bosted and R. Carlini and C. Chen and M. Christy and L. Cole and S. Danagoulian and A. Daniel and V. Dharmawardane and K. Egiyan and M. Elaasar and R. Ent and H. Fenker and Y. Fujii and M. Furic and L. Gan and D. Gaskell and A. Gasparian and E. F. Gibson and T. Gogami and P. Gueye and Y. Han and O. Hashimoto and E. Hiyama and D. Honda and T. Horn and B. Hu and Ed V. Hungerford and C. Jayalath and M. Jones and K. Johnston and N. Kalantarians and H. Kanda and M. Kaneta and F. Kato and S. Kato and D. Kawama and C. Keppel and K. J. Lan and W. Luo and D. Mack and K. Maeda and S. Malace and A. Margaryan and G. Marikyan and P. Markowitz and T. Maruta and N. Maruyama and T. Miyoshi and A. Mkrtchyan and H. Mkrtchyan and S. Nagao and T. Navasardyan and G. Niculescu and M. -I. Niculescu and H. Nomura and K. Nonaka and A. Ohtani and M. Oyamada and N. Perez and T. Petkovic and S. Randeniya and J. Reinhold and J. Roche and Y. Sato and E. K. Segbefia and N. Simicevic and G. Smith and Y. Song and M. Sumihama and V. Tadevosyan and T. Takahashi and L. Tang and K. Tsukada and V. Tvaskis and W. Vulcan and S. Wells and S. A. Wood and C. Yan and S. Zhamkochyan},
journal= {arXiv preprint arXiv:1207.0571},
year = {2015}
}
Comments
5 pages, 4 figures, submitted to PRL